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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2321658306564102 4.5356e-08  
a 2.310173818310287 1.0873e-08 AU
q 1.773830394821588 1.0119e-07 AU
i 2.57930847835805 6.3661e-06 deg
node 199.4824740795235 0.00011781 deg
peri 221.2819388363881 0.00011955 deg
M 29.76833467520632 1.6222e-05 deg
tp 2456894.448344553763
(2014-Aug-24.94834455)
5.7707e-05 JED
period 1282.523741324492
3.51
9.0543e-06
2.479e-08
d
yr
n .2806965582003337 1.9817e-09 deg/d
Q 2.846517241798986 1.3397e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      823  
   data-arc span      9370 days (25.65 yr)  
   first obs. used      1989-10-03  
   last obs. used      2015-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51231  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:30  

Additional Information
 Earth MOID = .787091 AU 
 T_jup = 3.547 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7 mag n/a MPO337435  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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